also as an Indian it's my experience that Pakistanis and Indians in foreign countries tend to hang together rather than separately, at least in the circles I've been a part of.
I think Indians and Pakistanis quickly understand that outside their native countries they are probably the same and almost have similar culture/language/food.
They do in their native countries as well, what changes when they leave is they leave behind a tense political rivalry that gets used in service of explaining the shortcomings of the respective countries. Without the political climate as background noise both parties tend to get along